There are two very good websites for reviewing lens.
http://www.photozone.de/
http://photodo.com/
They both have longer history to review lens than dpreview.com and they also both have more lens reviewed than dpreview.com. They both have more technique results done than dpreview.com. They have distortion, vignetting, MTF (resolution) (modulation transfer function), chromatic aberrations etc. in both numbers and graph forms. dpreview.com only started to have lens review last year.
For photodo.com, they claim they have 1102 lenses,
428 MTF tests,74 in-depth photodo reviews
100+ users join each day. One good feature of photodo.com is they rank a lens from 0 to 5, 5 being the best. They also have users' input. But you have to join in to see the full features (it is free). One thing I don't like is that they don't have many newer lenses to be reviewed.
